Isao Ashida
5Patents
2h-index
5Co-inventors
36Inventor score
Filing activity: May 21, 1998 → Apr 8, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6401235B1 | Method of and apparatus for producing exposure mask | Physics | 6 | Expired |
| US6780659B2 | Stencil mask and method of producing the same, semiconductor device produced using the stencil mask and method of producing the semiconductor device | Physics | 3 | Expired |
| US7109500B2 | Mask pattern correction method, semiconductor device manufacturing method, mask manufacturing method and mask | Electricity | 2 | Expired |
| US7010434B2 | Complementary division condition determining method and program and complementary division method | Electricity | 2 | Expired |
| US6658641B2 | Method for mask data verification and computer readable record medium recording the verification program | Physics | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.